Combined gas and electric light fixture



(No Model.)

T. J. PIERCE.

COMBINED GASAND BLEGTRIG LXGHT FIXTURE.

No. 409,498. Patented Aug. 20, 1889.

N PETERS. Pmaumegnphev. washingwn. D. C.

UNITED STATES PATENT OFFICE.

THOMAS J. PIERCE, OF PHILADELPHIA, PENNSYLVANIA,

COMBINED GAS AND ELECTRIC LIGHT FIXTURE.

SPECIFICATION forming part of Letters Patent No. 409,498, dated August 20, 1889.

Application filed June 19, 1888. Serial No. 277,582. (No model.)

To all whom, t may concern:

3e it known that I, THOMAS J. PIERCE, a citizen of the United States7 residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in a Combined Electric and Gas Light Fixture; and I do hereby declare the following to be a su'lliciently full, clear, and exact description thereof to enable others skilled in the art to make and use the said. invention.

This invention relates to lixtures for illuminating by gas-jets and by electricity, used either alternatively orsim ult-aneously, and has for its object, by an improved construction of parts, the facilitating oit the manufacture and the making of more substantial xtures adapted to the masking el' the electrical condiict- Ors and the protection of such conductors from injury by accident or from wear, and the convenient flexibility of the xtiire without impairing the utility and convenience of the fixture for use in gas-lighting.

llie nature of this invention consists in a surrounding metallic shell formed integrally with and braced by webs to each member of the flexible joints et' the gas-fixture, inclosing an intervening chamber or conduit adapted to receive insulated electrical conductors required for lighting and support and protect the saine without injury from tlexure of the joints of the fixture, such joints being united by inner and outer tubes providing conduits for concealing and protecting the insulated conductors and for the passage et' gas to the burner, as hereinafter fully described, and shown in the accompanying drawings.

Referring to the drawings, Figure l shows a sideview of a ilexible or swinging bracketfixture containing this invention; Fig. 2, a vertical central section of a bracket with a swing-joint containing this invention; Fig. 3, a transverse vertical section of one of the swing-joints; Fig. 4, a detached view of one of the insulating-collars for guiding and protecting the electrical conductors through the joints, and Fig. 5 is a section in the plane in dicated by the dotted line .Z in Fig. 3.

The saine letters of reference indicate the same parts in the several figures.

A represents the stationary member of a swingwbracket lixture, screw-threaded internally at the socket A to lit the usual gaspipe nipple, and having a stop-cock plug D litting in a conical socket B', and the conical plug C of a swing-joint, fitting in a conical socket O. A central tube A2 extends ecntrail y from the socket A to the conical chainber O, where it terminates in a circular groove c2. The outer shell A is cast with the tube A2 and socket A and conical sockets B and C with an intervening chamber A, produced by coring in casting the part A. The upper part A5 of the space A'l surrounding the socket C is open, leaving a circular space between the shell A:i at that point and the socket C at that point. Apertures AG lead through the shell Ag'into the cavity A".

The upper portion ot the plug O is sur rounded by a shell C?, connected with the plug O by the tube C3, having a socket C5 at right angles thereto, all cast in one piece with the plug C, and having a chamber C'L between the tube C2" and shell. C2, open at the bottoni O around the tube C3 and at the side C around the socket Ci". The internaltubular parts of the joints are braced tothe exter nal shells by webs CT, one of which is shown in section in Fig. 5. These webs of metal serve to brace and stiften the parts of the fixture so as to support the internal tube and hold it iirnily to shape and position dining the turning, drilling, and screw-threadingrequired fer finishing and [itting the parts, which would otherwise distort it7 permitting an economy of material without impairing the strength. In the founding or casting operation tlie webs furnish a faeilityin making and placing tlie cores for producing the cavin ties or chambers Ol. rFhe location of the webs, as shown in Fig. 5, is such as to avoid abrading the insulated conductors. A collar D of electrical insulating material (shown detached in Fig. a) lits in the openings A5 and GT, so as to turn therein with a bead D2 between the parts. Through the collar D is a central hole D for the passage of electrical conduct ors. The opening O is screw-threaded and has fitted in it a tube E, which surrounds, with an intervening space E the tube F.

To the outer end el the tube E is attached IOO a chambered casting G, having in the center a socket G', formed therein and screwed to the tube F. The upper part of the socket G is attached by a vtube G2 to the chamber G, all formed in a single casting by coring, with a space G3, having an opening G4 through a nipple G5 at the bottom, to which an incandescent electric-light bulb H is secured in the usual manner. The upper end of the tube G2 terminates in a nipple G6, to Which a gas-burner is applied. As shown in Fig. l, an additional swing-joint is shown, the construction of which is the same as that shown in Figs. 2 and 3. The collar D serves to support the shell C2 upon the shell A3, and, fitting the rim A5, materially strengthens the joint.

In use the gas passes from the pipe, on which the socket A is screwed, through the tube A2, being regulated or stopped by turning the plug B into the groove c2', enters the tube C2, passes thence through the tube F to the pipe G2 upwardly into the burner J,Wl1ence it issues and burns. The electric Wires K pass into the chamber A4 through the apertures A, thence after being loosely coiled under the collar D in the chamber A4 around the socket C upward through the central hole D in the collar D, thence through the space E to the chamber G3, and downwardly through the openin g G4 into the electric-light bulb H.

Itis obvious that the same arrangement and construction are applicable to chandeliers and other forms ot gas and electric lighting fixtures.

Having described my invention and the mode of making and operating the same, What I claim isl. In aoombined'gas and electric `light Iixture, the combination of the shells C2 and A3, and theinsulating-collar D, located in and between the said shells, with the plug C and gastube C3, substantially as shown and described, and for the purpose set forth.

2. In a combined gas and electric light ixture, the combination of the shell C2, having a central gas-channel surrounded by an electric-wire channel, With the insulating-collar D, provided with the bead D2, adapted to support the said shell, substantially as shown and described, and for the purpose set-forth.

THOS. J. PIERCE.

Vitnesses:

J. DANIEL EBY, VAN WYoK BUDD. 

